What Does P2721 Mean?
The TCM has detected voltage in the pressure control solenoid D circuit is higher than specifications. This typically indicates a short to power in the wiring or a failed TCM output driver stuck high.
Common Causes
40%
Short to voltage in solenoid D control circuit wiring
30%
Failed TCM with shorted output driver stuck at high voltage
20%
Failed pressure control solenoid D with internal short to power
8%
Damaged connector causing cross-circuit short to power wire
2%
Wiring harness damaged by heat or rubbing causing short to power
Diagnostic Steps
1
Step 1: Disconnect pressure control solenoid D connector and check voltage at harness side (should be 0V)
2
Step 2: If voltage is present at disconnected harness, trace wiring for short to power source
3
Step 3: Inspect wiring harness routing for damage near power wires or hot components
4
Step 4: With solenoid disconnected, command solenoid on/off with scan tool and monitor TCM output voltage
5
Step 5: If TCM output remains high regardless of command, suspect failed TCM output driver
Estimated Repair Cost
$200 - $1,200
Parts + labor, varies by vehicle and location
The TCM has detected voltage in the pressure control solenoid D circuit is higher than specifications. This typically indicates a short to power in the wiring or a failed TCM output driver stuck high.
The most common cause of P2721 (Pressure Control Solenoid "D" Control Circuit High) is: Short to voltage in solenoid D control circuit wiring
Typical repair costs for P2721 range from $200 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May cause transmission to remain in one gear or activate limp mode. Solenoid may be energized continuously, potentially causing overheating or improper pressure control.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2721 to identify the root cause.
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Quick Info
Category
Powertrain
System
Automatic Transmission
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
